xref: /illumos-gate/usr/src/cmd/sgs/demo_rdb/common/callstack.c (revision d9328cd43f1300af79f6fc8a3ad4760137618c63)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright (c) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
24  */
25 
26 #include <stdio.h>
27 #include <unistd.h>
28 #include <string.h>
29 #include <sys/types.h>
30 #include <sys/reg.h>
31 #include <sys/frame.h>
32 #include <sys/stack.h>
33 #include <sys/machelf.h>
34 #include <procfs.h>
35 
36 #include "rdb.h"
37 
38 #ifndef	STACK_BIAS
39 #define	STACK_BIAS	0
40 #endif
41 
42 static int
get_frame(struct ps_prochandle * ph,psaddr_t fp,struct frame * frm)43 get_frame(struct ps_prochandle *ph, psaddr_t fp, struct frame *frm)
44 {
45 #if	defined(_LP64)
46 	/*
47 	 * Use special structures to read a 32-bit process
48 	 * from a 64-bit process.
49 	 */
50 	if (ph->pp_dmodel == PR_MODEL_ILP32) {
51 		struct frame32	frm32;
52 
53 		if (ps_pread(ph, (psaddr_t)fp, (char *)&frm32,
54 		    sizeof (struct frame32)) != PS_OK) {
55 			(void) printf("stack trace: bad frame pointer: 0x%lx\n",
56 				fp);
57 			return (-1);
58 		}
59 
60 		frm->fr_savpc = (long)frm32.fr_savpc;
61 #if	defined(__sparcv9)
62 		frm->fr_savfp = (struct frame *)(uintptr_t)frm32.fr_savfp;
63 #elif	defined(__amd64)
64 		frm->fr_savfp = (long)frm32.fr_savfp;
65 #endif
66 		return (0);
67 	}
68 #endif	/* defined(_LP64) */
69 
70 	if (ps_pread(ph, (psaddr_t)fp + STACK_BIAS, (char *)frm,
71 	    sizeof (struct frame)) != PS_OK) {
72 		(void) printf("stack trace: bad frame pointer: 0x%lx\n", fp);
73 		return (-1);
74 	}
75 	return (0);
76 }
77 
78 /*
79  * Relatively architecture neutral routine to display the callstack.
80  */
81 void
CallStack(struct ps_prochandle * ph)82 CallStack(struct ps_prochandle *ph)
83 {
84 	pstatus_t	pstatus;
85 	greg_t		fp;
86 	struct frame	frm;
87 	char		*symstr;
88 
89 	if (pread(ph->pp_statusfd, &pstatus, sizeof (pstatus), 0) == -1)
90 		perr("cs: reading status");
91 
92 	symstr = print_address_ps(ph, (ulong_t)pstatus.pr_lwp.pr_reg[R_PC],
93 	    FLG_PAP_SONAME);
94 	(void) printf(" 0x%08x:%-17s\n", EC_WORD(pstatus.pr_lwp.pr_reg[R_PC]),
95 	    symstr);
96 
97 	fp = pstatus.pr_lwp.pr_reg[R_FP];
98 
99 	while (fp) {
100 		if (get_frame(ph, (psaddr_t)fp, &frm) == -1)
101 			return;
102 		if (frm.fr_savpc) {
103 			symstr = print_address_ps(ph, (ulong_t)frm.fr_savpc,
104 			    FLG_PAP_SONAME);
105 			(void) printf(" 0x%08x:%-17s\n", EC_WORD(frm.fr_savpc),
106 			    symstr);
107 		}
108 		fp = (greg_t)frm.fr_savfp;
109 	}
110 }
111